How do I create custom thumbnails for Flashlight portfolio items? I understand I can reorder the portfolio images by dragging and dropping them in the Upload Gallery pop-up page, but how can I create custom thumbnails? I tried going into Media Library and cropping the images the way I want and updating the image as a thumbnail, but it doesn’t show up on the Portfolio page.

I already know how to resize the image to a specific sized thumbnail, but I need to know how to create actually custom-cropped image as my thumbnail.